Product Name

: POTASSIUM NITRATE

C.A.S. No.

: 7757-79-1

Molecular Formula

: KNO₃

Molecular Weight

: 101.1g/mol

SPECIFICATION

BP

USP

Description

White or almost white, crystalline powder or colorless crystals.

White or almost white, crystalline powder or colorless crystals.

Solubility

Freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96 %)

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Identification

• Reaction
• Reaction

• It gives reaction of nitrates.
• It gives reaction of Potassium

• It gives reaction of nitrates.
• It gives reaction of Potassium

Acidity or Alkalinity

NMT 0.5 ml of 0.01 M HCl or 0.01 M NaOH is required to change the color of the indicator.

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Reducible Substances

The solution does not become blue within 2 min.

-

Chlorides

NMT 20 ppm

NMT 300 ppm

Sulfates

NMT 150 ppm

NMT 1000 ppm

Limit of Nitrite

-

NMT 5 ppm

Heavy metals

-

NMT 20 ppm

Arsenic

-

NMT 3 ppm

Lead

-

NMT 10 ppm

Ammonium

NMT 100 ppm

-

Calcium

NMT 100 ppm

-

Iron

NMT 20 ppm

NMT 10 ppm

Residual Solvents

-

Meets the requirements.

Sodium

NMT 1000 ppm

NMT 1000 ppm

Loss on Drying

NMT 0.5 %

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Assay

99.0 %-101.1 % (on dried basis)

99.0 %-100.5 %